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Bass natural trumpet.

Technical description: Brass, three coils; four ferrules; French bell rim. With three large rings for cording or banner, one small ring for chain to mouthpiece.; Nominal pitch: 13-ft E?.; ; ; ; ; Usable pitch: Probably built for use at A?=|435|Hz.;

  • Measurements:Overall size: from plane of bell to large bow proximal 588; bell 184.; Sounding length: minimum 4086.; Bore: mouthpipe at c|25mm from mouthpiece receiver (minimum bore) 11.65; main tuning-slide from 903mm to 1347mm from mouthpiece receiver, m.t.s. bore 12.85; at 2043mm from bell end, c|13.1; at c|739mm from bell end, 18.5.B|=|0.72.Dia of mouthpiece receiver: m.r.t. 12.4 - 12.0.